Answer : The wrong equation is,
Explanation :
The given equilibrium reaction is,

The expression for equilibrium constant in terms of concentration,
![K_c=\frac{1}{[O_2]^3}\\\\K_c=[O_2]^{-3}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B1%7D%7B%5BO_2%5D%5E3%7D%5C%5C%5C%5CK_c%3D%5BO_2%5D%5E%7B-3%7D)
The expression for equilibrium constant in terms of pressure,

The relation between the equilibrium constant in terms of concentration and equilibrium constant in terms of pressure will be,
where,
= number of moles of gaseous products - number of moles of gaseous reactants
R = gas constant
T= temperature
For reaction the given reaction,
= number of moles of gaseous products - number of moles of gaseous reactants= 0 - 3 = -3
Therefore, the correct equations for equilibrium are,
,
and